Ostial stent positioning device and method
First Claim
1. An intravascular system for delivering a stent to a vascular lumen adjacent an ostium, comprising:
- a stent delivery catheter having a proximal end, a proximal portion and a distal portion;
a stent disposed about the distal portion of the stent delivery catheter, the stent having a proximal end and a distal end; and
a stent positioning device disposed about the stent delivery catheter, the stent positioning device having a proximal end, a distal end, a length (L1), and a distally disposed expandable member, the expandable member having a distal expanded diameter that is larger than the vascular lumen adjacent the ostium.
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Accused Products
Abstract
A stent positioning device and associated method for precisely delivering and deploying an intravascular stent in a vascular lumen adjacent the ostium thereof. The stent positioning device is slidably disposed about a stent delivery catheter and includes a distally disposed expandable member having an expanded diameter that is larger than the vascular lumen adjacent the ostium. The stent positioning device is positioned in the vasculature such that the distal end of the expandable member engages the ostium. The stent delivery catheter is positioned such that the proximal end of the stent is positioned adjacent the distal end of the expandable member by using either a visible marker on the stent delivery catheter or a radiopaque marker on the expandable member. When the stent is positioned adjacent the distal end of the expandable member, the stent may be deployed such that the proximal end of the stent is located in the vascular lumen adjacent the ostium.
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Citations
26 Claims
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1. An intravascular system for delivering a stent to a vascular lumen adjacent an ostium, comprising:
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a stent delivery catheter having a proximal end, a proximal portion and a distal portion;
a stent disposed about the distal portion of the stent delivery catheter, the stent having a proximal end and a distal end; and
a stent positioning device disposed about the stent delivery catheter, the stent positioning device having a proximal end, a distal end, a length (L1), and a distally disposed expandable member, the expandable member having a distal expanded diameter that is larger than the vascular lumen adjacent the ostium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of delivering a stent through a patients vasculature to a vascular lumen adjacent an ostium, comprising the steps of:
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providing a stent delivery catheter having a proximal portion, a distal portion and a distally disposed stent;
providing a stent positioning device having a proximal end, a distal end, and a distally disposed expandable member, the expandable member having a distal end and a distal expanded diameter that is larger than the vascular lumen adjacent the ostium;
placing the stent positioning device about the stent delivery catheter;
inserting and navigating the stent delivery catheter and stent positioning device through the vasculature to the vascular lumen across the ostium;
expanding the expandable member;
advancing the stent positioning device until the distal end of the expandable member engages the ostium;
retracting the stent delivery catheter while the stent positioning device remains in place until the proximal end of the stent is positioned adjacent the distal end of the expandable member; and
deploying the stent such that the proximal end of the stent is located in the vascular lumen adjacent the ostium. - View Dependent Claims (19, 20, 21, 22, 23)
collapsing the expandable member; and
withdrawing the stent delivery catheter and stent positioning device from the patient'"'"'s vasculature.
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22. A method of claim 18, further comprising the steps of:
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providing a sheath disposed about the stent positioning device and the expandable member; and
moving the sheath relative to the expandable member to expand or collapse the expandable member.
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23. A method of claim 18, further comprising the steps of:
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providing a guide catheter disposed about the stent positioning device and the expandable member; and
moving the guide catheter relative to the expandable member to expand or collapse the expandable member.
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24. A method of delivering a stent through a patient'"'"'s vasculature to a vascular lumen adjacent an ostium utilizing a stent delivery catheter having the stent distally disposed thereon and a stent positioning device having an expandable member, the method comprising the steps of:
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positioning the stent positioning device in the vasculature such that a distal end of the expandable member engages the ostium;
positioning the stent delivery catheter such that a proximal end of the stent is positioned adjacent the distal end of the expandable member; and
deploying the stent such that the proximal end of the stent is located in the vascular lumen adjacent the ostium. - View Dependent Claims (25, 26)
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Specification